Top 100 Contractors in NAICS 621511: Medical Laboratories, FY2024

Name: Top 100 Contractors in NAICS 621511: Medical Laboratories, FY2024
Creator: GovTribe

Parent companies by net contract obligations Oct 1, 2023 – Sep 30, 2024 Code page on GovTribe

The top 10 won 59% of FY2024 NAICS 621511 contract dollars

Contract obligations: $401,611,233 Net of deobligations, by contracts coded NAICS 621511
Contractors: 471 Parent companies with an obligation
Largest contractor: Laboratory Corporation of America $111 million, 22.0% of obligations
Data as of: Oct 14, 2026

Contract actions from FPDS (SAM.gov). How the rankings work · Download all 100 rows as CSV

Full ranking

Rank	Contractor	Net obligations	Share	Trend
1	Laboratory Corporation of America 7 awardees, including Center for Disease Detection, LLC, Labcorp Oklahoma Inc. and Medtox Laboratories Inc. Top agencies DHA (Defense Health Agency) VA (Department of Veterans Affairs) Army (Department of the Army)	$111,229,044	22.0%	Rank history: #14 in FY2021, #8 in FY2022, #2 in FY2023 and #1 in FY2025; up 1 since FY2023.
2	Quest Diagnostics Incorporated 7 awardees, including Diagnostic Laboratory of Oklahoma LLC, Ameripath Inc. and Quest Diagnostics of Puerto Rico Inc. Top agencies VA (Department of Veterans Affairs) DOJ (Department of Justice) HHS (Department of Health and Human Services)	$104,386,861	20.7%	Rank history: #5 in FY2021, #4 in FY2022, #1 in FY2023 and #2 in FY2025; down 1 since FY2023.
3	Roche Diabetes Care Inc Through Foundation Medicine, Inc. Top agencies VA (Department of Veterans Affairs)	$23,245,082	4.6%	Rank history: not on the FY2021–FY2022 lists, #5 in FY2023 and not on the FY2025 list; up 2 since FY2023.
4	SNA International LLC Top agencies OSD (Office of the Secretary of Defense) WHS (DOD Washington Headquarters Service)	$17,407,755	3.4%	Rank history: not on the FY2021 list, #11 in FY2022, #6 in FY2023 and #4 in FY2025; up 2 since FY2023.
5	Arlluk Technology Solutions LLC Top agencies USAF (Department of the Air Force)	$10,918,050	2.2%	Rank history: not on the FY2021–FY2023 lists and not on the FY2025 list; new.
6	Tempus AI, Inc. Top agencies VA (Department of Veterans Affairs)	$10,124,643	2.0%	Rank history: not on the FY2021 list, #21 in FY2022, #30 in FY2023 and #12 in FY2025; up 24 since FY2023.
7	Abbott Laboratories Inc. 3 awardees, including Pembrooke Occupational Health, Inc., Alere Toxicology Services, Inc. and Redwood Toxicology Laboratory, Inc. Top agencies OSD (Office of the Secretary of Defense) DOT (Department of Transportation) DOJ (Department of Justice)	$6,361,278	1.3%	Rank history: not on the FY2021–FY2023 lists and #16 in FY2025; new.
8	The Henry M. Jackson Foundation for the Advancement of Military Medicine, Inc. Top agencies DHA (Defense Health Agency)	$4,922,653	1.0%	Rank history: #24 in FY2021, #15 in FY2022, #8 in FY2023 and #5 in FY2025; unchanged since FY2023.
9	Fulgent Genetics, Inc. 2 awardees, including Fulgent Therapeutics LLC Top agencies VA (Department of Veterans Affairs)	$4,583,914	0.9%	Rank history: #10 in FY2021, #19 in FY2022, #26 in FY2023 and #9 in FY2025; up 17 since FY2023.
10	MCI Diagnostic Center LLC Top agencies DOL (Department of Labor) VA (Department of Veterans Affairs) Army (Department of the Army)	$4,242,173	0.8%	Rank history: not on the FY2021–FY2022 lists, #7 in FY2023 and not on the FY2025 list; down 3 since FY2023.
11	Sonora Quest Laboratories LLC Top agencies HHS (Department of Health and Human Services) VA (Department of Veterans Affairs)	$4,151,517	0.8%	Rank history: not on the FY2021–FY2023 lists and #14 in FY2025; new.
12	Mayo Collaborative Services, Inc. Top agencies HHS (Department of Health and Human Services) VA (Department of Veterans Affairs) DHA (Defense Health Agency)	$3,910,261	0.8%	Rank history: #69 in FY2021, not on the FY2022–FY2023 lists and #11 in FY2025; returned.
13	Mayo Clinic Through Mayo Collaborative Services, Inc. Top agencies HHS (Department of Health and Human Services) VA (Department of Veterans Affairs) DHA (Defense Health Agency)	$3,564,505	0.7%	Rank history: #19 in FY2021, #20 in FY2022, #11 in FY2023 and not on the FY2025 list; down 2 since FY2023.
14	Northern Plains Laboratory LLC Top agencies HHS (Department of Health and Human Services) Army (Department of the Army)	$3,532,369	0.7%	Rank history: #33 in FY2021, #25 in FY2022, #15 in FY2023 and #13 in FY2025; up 1 since FY2023.
15	Arup Laboratories Inc. Top agencies VA (Department of Veterans Affairs) HHS (Department of Health and Human Services)	$3,444,908	0.7%	Rank history: not on the FY2021–FY2023 lists and #10 in FY2025; new.
16	Family Health International Top agencies USAID (US Agency for International Development)	$3,390,000	0.7%	Rank history: not on the FY2021–FY2023 lists and #7 in FY2025; new.
17	Tatitlek Federal Services LLC Top agencies Army (Department of the Army)	$2,781,679	0.6%	Rank history: not on the FY2021–FY2023 lists and #20 in FY2025; new.
18	Cherokee Nation Operational Solutions, L.L.C. Top agencies HHS (Department of Health and Human Services)	$2,634,179	0.5%	Rank history: not on the FY2021–FY2022 lists, #23 in FY2023 and #21 in FY2025; up 5 since FY2023.
19	Neogenomics Inc. Through Neogenomics Laboratories, Inc. Top agencies VA (Department of Veterans Affairs) USAF (Department of the Air Force)	$2,573,860	0.5%	Rank history: not on the FY2021–FY2023 lists and #24 in FY2025; new.
20	Oregon Health & Science University Top agencies VA (Department of Veterans Affairs)	$2,502,741	0.5%	Rank history: #30 in FY2021, #44 in FY2022, #25 in FY2023 and #18 in FY2025; up 5 since FY2023.
21	Exact Sciences Corporation 4 awardees, including Preventiongenetics LLC and Genomic Health, Inc. Top agencies VA (Department of Veterans Affairs) DHA (Defense Health Agency) USAF (Department of the Air Force)	$2,322,810	0.5%	Rank history: #20 in FY2021, #47 in FY2022, #20 in FY2023 and #23 in FY2025; down 1 since FY2023.
22	Creative Testing Solutions Top agencies DHA (Defense Health Agency) HHS (Department of Health and Human Services)	$2,250,815	0.4%	Rank history: #46 in FY2021, #23 in FY2022, #34 in FY2023 and #17 in FY2025; up 12 since FY2023.
23	Appddictionstudio Limited Liability Company Top agencies USAF (Department of the Air Force)	$2,152,772	0.4%	Rank history: not on the FY2021–FY2023 lists and #89 in FY2025; new.
24	Ginkgo Bioworks Holdings Inc. Through Ginkgo Bioworks, Inc. Top agencies HHS (Department of Health and Human Services)	$2,011,282	0.4%	Rank history: not on the FY2021–FY2023 lists and #28 in FY2025; new.
25	Psomagen Inc. Top agencies HHS (Department of Health and Human Services)	$1,984,405	0.4%	Rank history: not on the FY2021–FY2023 lists and #64 in FY2025; new.
26	Mariano Prime LLC Top agencies DHA (Defense Health Agency)	$1,973,961	0.4%	Rank history: not on the FY2021–FY2023 lists and #31 in FY2025; new.
27	DST Innovation GMBH Top agencies DOS (Department of State)	$1,729,015	0.3%	Rank history: not on the FY2021–FY2023 lists and not on the FY2025 list; new.
28	Labcorp Oklahoma Inc. Top agencies HHS (Department of Health and Human Services)	$1,620,848	0.3%	Rank history: not on the FY2021–FY2022 lists, #28 in FY2023 and #19 in FY2025; unchanged since FY2023.
29	University of Texas System 3 awardees, including The University of Texas Southwestern Medical Center, The University of Texas Health Science Center At San Antonio and The University of Texas Health Science Center At Tyler Top agencies VA (Department of Veterans Affairs) HHS (Department of Health and Human Services)	$1,489,847	0.3%	Rank history: not on the FY2021 list, #36 in FY2022, #81 in FY2023 and not on the FY2025 list; up 52 since FY2023.
30	University of Wisconsin System 2 awardees, including University of Wisconsin Hospitals and Clinics Authority Top agencies VA (Department of Veterans Affairs)	$1,465,270	0.3%	Rank history: not on the FY2021 list, #67 in FY2022, #38 in FY2023 and not on the FY2025 list; up 8 since FY2023.
31	The Leland Stanford Junior University 2 awardees, including Stanford Health Care and Stanford Hospital & Clinics Top agencies VA (Department of Veterans Affairs)	$1,437,281	0.3%	Rank history: #42 in FY2021, #39 in FY2022, #88 in FY2023 and not on the FY2025 list; up 57 since FY2023.
32	Upmc Presbyterian Shadyside Top agencies VA (Department of Veterans Affairs)	$1,406,905	0.3%	Rank history: not on the FY2021–FY2023 lists and #37 in FY2025; new.
33	Navitas Clinical Research Inc. Top agencies HHS (Department of Health and Human Services)	$1,365,906	0.3%	Rank history: not on the FY2021–FY2023 lists and #39 in FY2025; new.
34	State of California Controllers Office 5 awardees, including California Department of Public Health, University of California, Davis and Ucla Department of Pathology & Laboratory Medicine Top agencies DHA (Defense Health Agency) VA (Department of Veterans Affairs)	$1,336,750	0.3%	Rank history: #40 in FY2021, #32 in FY2022, #35 in FY2023 and not on the FY2025 list; up 1 since FY2023.
35	Danaher Corporation 2 awardees, including Cepheid and Beckman Coulter Gesellschaft MIT Beschraenkter Haftung Top agencies DHA (Defense Health Agency) HHS (Department of Health and Human Services) DHS (Department of Homeland Security)	$1,295,459	0.3%	Rank history: #35 in FY2021, #58 in FY2022, #29 in FY2023 and #40 in FY2025; down 6 since FY2023.
36	University of Utah 2 awardees, including Arup Laboratories Inc. Top agencies VA (Department of Veterans Affairs)	$1,225,727	0.2%	Rank history: #23 in FY2021, #16 in FY2022, #10 in FY2023 and not on the FY2025 list; down 26 since FY2023.
37	Baylor Miraca Genetics Laboratories LLC Top agencies VA (Department of Veterans Affairs) HHS (Department of Health and Human Services)	$1,217,602	0.2%	Rank history: not on the FY2021–FY2023 lists and #6 in FY2025; new.
38	South Carolina State of Through Medical University Hospital Authority Top agencies VA (Department of Veterans Affairs)	$1,207,862	0.2%	Rank history: not on the FY2021 list, #73 in FY2022, not on the FY2023 list and #62 in FY2025; up 70 since FY2023.
39	Aegis Toxicology Sciences Corporation Through Aegis Sciences Corporation Top agencies HHS (Department of Health and Human Services)	$1,135,113	0.2%	Rank history: not on the FY2021–FY2023 lists and #81 in FY2025; new.
40	Cardionet LLC Top agencies VA (Department of Veterans Affairs)	$1,085,982	0.2%	Rank history: not on the FY2021–FY2023 lists and #49 in FY2025; new.
41	Koninklijke Philips N.V. Through Cardionet, LLC Top agencies VA (Department of Veterans Affairs)	$1,067,480	0.2%	Rank history: not on the FY2021–FY2022 lists, #66 in FY2023 and not on the FY2025 list; up 25 since FY2023.
42	Genscript USA Inc. Top agencies HHS (Department of Health and Human Services)	$1,026,000	0.2%	Rank history: #56 in FY2021, #51 in FY2022, #47 in FY2023 and #45 in FY2025; up 5 since FY2023.
43	Regents of the University of Michigan Top agencies VA (Department of Veterans Affairs)	$988,433	0.2%	Rank history: #70 in FY2021, #92 in FY2022, #53 in FY2023 and #53 in FY2025; up 10 since FY2023.
44	The University of Iowa Top agencies VA (Department of Veterans Affairs) HHS (Department of Health and Human Services)	$984,383	0.2%	Rank history: not on the FY2021–FY2022 lists, #72 in FY2023 and #50 in FY2025; up 28 since FY2023.
45	Siemens Corporation Through Varian Medical Systems, Inc. Top agencies USAF (Department of the Air Force)	$982,524	0.2%	Rank history: not on the FY2021–FY2023 lists and not on the FY2025 list; new.
46	Veracyte, Inc. 2 awardees, including Veracyte Labs SD Corporation Top agencies VA (Department of Veterans Affairs) DHA (Defense Health Agency)	$937,658	0.2%	Rank history: not on the FY2021 list, #85 in FY2022, #49 in FY2023 and #32 in FY2025; up 3 since FY2023.
47	Brigham & Womens Hospital Inc 2 awardees, including The General Hospital Corporation Top agencies VA (Department of Veterans Affairs)	$893,582	0.2%	Rank history: #81 in FY2021, #69 in FY2022, #39 in FY2023 and #67 in FY2025; down 8 since FY2023.
48	Vanderbelt University Medical Center Through Vanderbilt University Medical Center Top agencies VA (Department of Veterans Affairs)	$867,940	0.2%	Rank history: #61 in FY2021, #45 in FY2022, #37 in FY2023 and not on the FY2025 list; down 11 since FY2023.
49	QPS Austria GMBH Top agencies HHS (Department of Health and Human Services)	$866,800	0.2%	Rank history: not on the FY2021–FY2023 lists and not on the FY2025 list; new.
50	Physicians Laboratory, P.C. Top agencies VA (Department of Veterans Affairs)	$863,246	0.2%	Rank history: not on the FY2021 list, #42 in FY2022, #50 in FY2023 and #41 in FY2025; unchanged since FY2023.
51	Laboratory Corporation of America Holdings 5 awardees, including Laboratory Corporation of America and NWT Inc. Top agencies VA (Department of Veterans Affairs) Army (Department of the Army) USAF (Department of the Air Force)	$861,885	0.2%	Rank history: #4 in FY2021, #3 in FY2022, #4 in FY2023 and #35 in FY2025; down 47 since FY2023.
52	Caredx, Inc. Top agencies VA (Department of Veterans Affairs)	$859,023	0.2%	Rank history: not on the FY2021 list, #40 in FY2022, #24 in FY2023 and #15 in FY2025; down 28 since FY2023.
53	Trinity Health Corporation Through Loyola University Health System Top agencies VA (Department of Veterans Affairs)	$807,313	0.2%	Rank history: #67 in FY2021, not on the FY2022 list, #59 in FY2023 and not on the FY2025 list; up 6 since FY2023.
54	Labstat International Inc. Top agencies HHS (Department of Health and Human Services)	$802,651	0.2%	Rank history: not on the FY2021 list, #34 in FY2022, #82 in FY2023 and not on the FY2025 list; up 28 since FY2023.
55	Virginia Polytechnic Institute & State University Through Department of General Services Virginia Top agencies DHA (Defense Health Agency)	$772,800	0.2%	Rank history: #74 in FY2021, #87 in FY2022, #77 in FY2023 and not on the FY2025 list; up 22 since FY2023.
56	Research Triangle Institute Top agencies HHS (Department of Health and Human Services)	$766,467	0.2%	Rank history: not on the FY2021 list, #30 in FY2022, #17 in FY2023 and #70 in FY2025; down 39 since FY2023.
57	Diagnostic Laboratory Services, Inc. Top agencies HHS (Department of Health and Human Services) DHA (Defense Health Agency)	$756,572	0.1%	Rank history: not on the FY2021–FY2023 lists and #42 in FY2025; new.
58	Cytopath Biopsy Lab Inc. Top agencies VA (Department of Veterans Affairs)	$696,142	0.1%	Rank history: not on the FY2021–FY2023 lists and #38 in FY2025; new.
59	San Diego Pathologists Medical Group, Inc. Top agencies VA (Department of Veterans Affairs)	$682,682	0.1%	Rank history: not on the FY2021–FY2022 lists, #84 in FY2023 and #86 in FY2025; up 25 since FY2023.
60	Metabolon, Inc. Top agencies HHS (Department of Health and Human Services)	$680,800	0.1%	Rank history: not on the FY2021–FY2023 lists and not on the FY2025 list; up 50 since FY2023.
61	Mdxhealth Inc. Top agencies VA (Department of Veterans Affairs)	$671,210	0.1%	Rank history: not on the FY2021–FY2022 lists, #69 in FY2023 and #73 in FY2025; up 8 since FY2023.
62	Central TOX LLC Top agencies VA (Department of Veterans Affairs) Army (Department of the Army)	$667,956	0.1%	Rank history: not on the FY2021 list, #82 in FY2022, #64 in FY2023 and #63 in FY2025; up 2 since FY2023.
63	University of California, LOS Angeles Top agencies HHS (Department of Health and Human Services) VA (Department of Veterans Affairs)	$644,851	0.1%	Rank history: not on the FY2021–FY2023 lists and #78 in FY2025; new.
64	National Medical Services, Inc. Top agencies HHS (Department of Health and Human Services) DOJ (Department of Justice) VA (Department of Veterans Affairs)	$624,997	0.1%	Rank history: not on the FY2021–FY2022 lists, #74 in FY2023 and #59 in FY2025; up 10 since FY2023.
65	Dhhs State Public Health Lab Top agencies DHA (Defense Health Agency)	$588,720	0.1%	Rank history: not on the FY2021–FY2023 lists and #71 in FY2025; new.
66	Veracyte Labs SD Corporation Top agencies VA (Department of Veterans Affairs)	$583,787	0.1%	Rank history: not on the FY2021–FY2023 lists and not on the FY2025 list; new.
67	Bloodworks Top agencies VA (Department of Veterans Affairs) DHA (Defense Health Agency)	$575,386	0.1%	Rank history: #44 in FY2021, #64 in FY2022, #65 in FY2023 and #26 in FY2025; down 2 since FY2023.
68	Natera Inc. Top agencies VA (Department of Veterans Affairs)	$546,347	0.1%	Rank history: not on the FY2021 list, #28 in FY2022, #78 in FY2023 and not on the FY2025 list; up 10 since FY2023.
69	Techne Corporation Through Exosome Diagnostics Inc. Top agencies VA (Department of Veterans Affairs)	$541,846	0.1%	Rank history: not on the FY2021–FY2023 lists and not on the FY2025 list; up 195 since FY2023.
70	South Central Pathology Lab Pa Top agencies VA (Department of Veterans Affairs)	$537,753	0.1%	Rank history: #87 in FY2021, #63 in FY2022, #76 in FY2023 and #48 in FY2025; up 6 since FY2023.
71	Peninsula Histopathology Laboratory Inc. Top agencies VA (Department of Veterans Affairs)	$535,197	0.1%	Rank history: #86 in FY2021, #71 in FY2022, #48 in FY2023 and #68 in FY2025; down 23 since FY2023.
72	Amprion, Inc. Top agencies HHS (Department of Health and Human Services)	$528,000	0.1%	Rank history: not on the FY2021–FY2022 lists, #42 in FY2023 and #61 in FY2025; down 30 since FY2023.
73	Chesapeake Toxicology Resources, LLC Top agencies DOT (Department of Transportation)	$512,457	0.1%	Rank history: not on the FY2021–FY2022 lists, #94 in FY2023 and #72 in FY2025; up 21 since FY2023.
74	Chenega Tri-Services, LLC Top agencies DHA (Defense Health Agency)	$475,519	0.1%	Rank history: not on the FY2021–FY2023 lists and #74 in FY2025; new.
75	American Veteran Contracting Solutions LLC Top agencies VA (Department of Veterans Affairs)	$468,000	0.1%	Rank history: #82 in FY2021, #83 in FY2022, #79 in FY2023 and #77 in FY2025; up 4 since FY2023.
76	Othram Inc. Top agencies DOI (Department of the Interior)	$443,868	0.1%	Rank history: not on the FY2021–FY2022 lists, #62 in FY2023 and not on the FY2025 list; down 14 since FY2023.
77	Indiana University Health, Inc. Top agencies VA (Department of Veterans Affairs)	$437,788	0.1%	Rank history: #95 in FY2021, #97 in FY2022, #91 in FY2023 and #80 in FY2025; up 14 since FY2023.
78	Quality Associates Inc. Through Ambry Genetics Corporation Top agencies VA (Department of Veterans Affairs)	$419,220	0.1%	Rank history: #85 in FY2021, not on the FY2022–FY2023 lists and not on the FY2025 list; returned.
79	Sonic Healthcare Limited 2 awardees, including Cytopath Biopsy Lab Inc. and Propath Services, LLC Top agencies VA (Department of Veterans Affairs) DHA (Defense Health Agency)	$411,644	0.1%	Rank history: #55 in FY2021, #52 in FY2022, #33 in FY2023 and not on the FY2025 list; down 46 since FY2023.
80	Wisconsin Diagnostic Laboratories LLC Top agencies VA (Department of Veterans Affairs)	$405,067	0.1%	Rank history: #89 in FY2021, not on the FY2022 list, #70 in FY2023 and not on the FY2025 list; down 10 since FY2023.
81	Yale Univ Top agencies VA (Department of Veterans Affairs) Navy (Department of the Navy)	$399,652	0.1%	Rank history: not on the FY2021 list, #29 in FY2022, #83 in FY2023 and #66 in FY2025; up 2 since FY2023.
82	Iowa Pathology Associates, P.C. Top agencies VA (Department of Veterans Affairs)	$395,596	0.1%	Rank history: not on the FY2021–FY2022 lists, #58 in FY2023 and #46 in FY2025; down 24 since FY2023.
83	Dialysis Clinic, Inc. Top agencies VA (Department of Veterans Affairs)	$387,660	0.1%	Rank history: #77 in FY2021, #94 in FY2022, #87 in FY2023 and not on the FY2025 list; up 4 since FY2023.
84	Dentrust Dental International, Inc. Top agencies DHS (Department of Homeland Security)	$381,179	0.1%	Rank history: not on the FY2021 list, #100 in FY2022, #86 in FY2023 and #99 in FY2025; up 2 since FY2023.
85	Biomerieux Inc. Through Biofire Defense LLC Top agencies Navy (Department of the Navy) DOS (Department of State)	$360,389	0.1%	Rank history: not on the FY2021–FY2023 lists and not on the FY2025 list; new.
86	Incyte Pathology, P.S Top agencies VA (Department of Veterans Affairs)	$360,329	0.1%	Rank history: not on the FY2021 list, #53 in FY2022, #51 in FY2023 and #65 in FY2025; down 35 since FY2023.
87	Hennepin Healthcare System Inc. Top agencies VA (Department of Veterans Affairs)	$348,580	0.1%	Rank history: not on the FY2021–FY2023 lists and #91 in FY2025; new.
88	Oregon Health Authority-Public Health Top agencies DHA (Defense Health Agency) HHS (Department of Health and Human Services)	$336,000	0.1%	Rank history: not on the FY2021–FY2023 lists and #88 in FY2025; new.
89	All American Express Solutions LLC Top agencies VA (Department of Veterans Affairs)	$335,862	0.1%	Rank history: not on the FY2021–FY2023 lists and #92 in FY2025; new.
90	The Pathology Group, P.C Top agencies VA (Department of Veterans Affairs)	$333,150	0.1%	Rank history: not on the FY2021–FY2022 lists, #97 in FY2023 and #94 in FY2025; up 7 since FY2023.
91	Biolab SARL U Top agencies DOS (Department of State)	$328,150	0.1%	Rank history: not on the FY2021–FY2023 lists and not on the FY2025 list; new.
92	Fairbanks Memorial Hospital, LLC Top agencies DHA (Defense Health Agency)	$318,852	0.1%	Rank history: not on the FY2021–FY2023 lists and #79 in FY2025; new.
93	Qualtex Laboratories Top agencies DHA (Defense Health Agency)	$313,984	0.1%	Rank history: not on the FY2021–FY2023 lists and not on the FY2025 list; new.
94	Metabolic Solutions, LLC Top agencies Army (Department of the Army) HHS (Department of Health and Human Services)	$306,722	0.1%	Rank history: not on the FY2021–FY2023 lists and not on the FY2025 list; new.
95	Summit Pathology Top agencies VA (Department of Veterans Affairs)	$278,906	0.1%	Rank history: #98 in FY2021, not on the FY2022–FY2023 lists and #87 in FY2025; up 9 since FY2023.
96	Perkinelmer Inc. Through Revvity Omics Inc. Top agencies DHA (Defense Health Agency) USAF (Department of the Air Force)	$274,772	0.1%	Rank history: not on the FY2021–FY2023 lists and not on the FY2025 list; up 5 since FY2023.
97	State of Alaska Through State of Alaska Department of Health Top agencies USAF (Department of the Air Force) DHA (Defense Health Agency)	$274,320	0.1%	Rank history: not on the FY2021–FY2023 lists and not on the FY2025 list; up 25 since FY2023.
98	Broad Clinical Laboratories, LLC Top agencies VA (Department of Veterans Affairs)	$270,000	0.1%	Rank history: #90 in FY2021, not on the FY2022–FY2023 lists and not on the FY2025 list; returned.
99	Nephropathology Associates, PLC Top agencies VA (Department of Veterans Affairs)	$269,222	0.1%	Rank history: not on the FY2021 list, #98 in FY2022, not on the FY2023 list and #58 in FY2025; up 34 since FY2023.
100	University of Wisconsin Hospitals and Clinics Authority Top agencies VA (Department of Veterans Affairs)	$262,372	0.1%	Rank history: not on the FY2021–FY2023 lists and #27 in FY2025; new.

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100 of 471 contractors listed here. See the rest on GovTribe.

How this ranking works

Source: every contract action FPDS records (as published on SAM.gov) in the period, as GovTribe received it.
Amounts are net obligations: what was obligated, less what was deobligated. Shares are of $505 million obligated before deobligations, so they never pass 100%.
Parent companies: each action counts under the ultimate parent its award record names, or under the awardee when it names none, so no dollar counts twice. Parents of the same name (Inc., LLC and the like aside) count as one company, since FPDS records a company's parent under more than one UEI over time. GovTribe corrects a few parents and names by hand; see the corrections.
Fiscal year 2024 ran Oct 1, 2023 – Sep 30, 2024. The Department of Defense reports its contract actions to FPDS about 90 days late, so a fiscal year is ranked once they're in, in February, and the list doesn't change after.
Rank changes compare with FY2023. "New" marks a company outside that period's top 500, and "Returned" one of those that was on an earlier fiscal year's list.
Rank lines show each company's rank on every fiscal year's list since FY2021, #1 at the top, on a scale that gives the top of the list more room. A dashed stretch spans years it wasn't on the list. The step from FY2023 takes the color of the rank change beside it.
Placeholder recipients FPDS uses when it names no company ("Miscellaneous Foreign Contractors" and the like) aren't ranked.

Quick answers

Who were the top 10 NAICS 621511 contractors in FY2024?

1. Laboratory Corporation of America ($111M), 2. Quest Diagnostics Incorporated ($104M), 3. Roche Diabetes Care Inc ($23.2M), 4. SNA International LLC ($17.4M), 5. Arlluk Technology Solutions LLC ($10.9M), 6. Tempus AI, Inc. ($10.1M), 7. Abbott Laboratories Inc. ($6.36M), 8. The Henry M. Jackson Foundation for the Advancement of Military Medicine, Inc. ($4.92M), 9. Fulgent Genetics, Inc. ($4.58M), 10. MCI Diagnostic Center LLC ($4.24M).

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